CVE-2021-40439 is a vulnerability in Apache OpenOffice
Published on October 7, 2021
Billion Laughs
Apache OpenOffice has a dependency on expat software. Versions prior to 2.1.0 were subject to CVE-2013-0340 a "Billion Laughs" entity expansion denial of service attack and exploit via crafted XML files. ODF files consist of a set of XML files. All versions of Apache OpenOffice up to 4.1.10 are subject to this issue. expat in version 4.1.11 is patched.
Weakness Type
What is a XXE Vulnerability?
The software processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output.
CVE-2021-40439 has been classified to as a XXE vulnerability or weakness.
Products Associated with CVE-2021-40439
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Affected Versions
Apache Software Foundation Apache OpenOffice:- Version Apache OpenOffice, <= 4.1.10 is affected.
- Version OpenOffice.org, <= 3.4 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.